Check your transmission cable bushing. Little plastic piece that tends to break. Dorman makes a replacement.
Automatic Transmission Shift Lock Control System
The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the engine is running. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components:
• The automatic transmission shift lock control solenoid
• The automatic transmission shift lock control switch
With the ignition in the ON position, voltage is supplied to automatic transmission shift lock control switch. Voltage flows through the normally closed contacts of the automatic transmission shift lock control switch to the automatic transmission shift lock control solenoid. The automatic transmission shift lock control solenoid is permanently grounded. This energizes the automatic transmission shift lock control solenoid causing the transmission shift lever to be physically locked in the PARK position. When the brake pedal is pressed the contacts in the automatic transmission shift lock control switch open, de-energizing the automatic transmission shift lock control solenoid. This allows the shift lever to be move out of the PARK position.
Circuit Description
The transmission range (TR) switch is part of the park/neutral position (PNP) and back-up lamp switch assembly, which is externally mounted on the transmission manual shaft. The TR switch contains four internal switches that indicate the transmission gear range selector lever position. The powertrain control module (PCM) supplies ignition voltage to each switch circuit. As the gear range selector lever is moved, the state of each switch may change, causing the circuit to open or close. An open circuit or switch indicates a high voltage signal. A closed circuit or switch indicates a low voltage signal. The PCM detects the selected gear range by deciphering the combination of the voltage signals. The PCM compares the actual voltage combination of the switch signals to a TR switch combination chart stored in memory.
These are all electronically controlled , yur best bet would be to take your vehicle to the dealer .
SOURCE: 2002 chevrolet trailblazer (daughter's car)
make sure the key is on and you are stepping on the brake pedal.
SOURCE: gear shift locked and in park position but dash
Not sure, but most likely the cable from the shift lever to the selector may be broken.
SOURCE: Key won't open doors of '05 Trailblazer
Please call a established locksmith in your area not a fly by night or want a be or scammers-ask common sense business questions-It;s not a hard vehicle to open -if your window is not after market tinited then a person could use a under the window tool. A locksmith would know what that is
SOURCE: I parked my 2003 Chevy Trailblazer in my driveway
If it is floor shift it has a soloind under the cover not to hard to remove, you have to memove the whole thing bolt in front cupholder and inside armrest storage. once it has removed there is a soloind in there that mounts on the shifter. this goes bad alot. Push the button on the silver soloind button this will release it into gear. Hope this helps. ( Usually he black soloind goes bad)
SOURCE: THe transmission will not shift out of park.
there is a brake switch that controls that by the brake ped
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